I have an LG LMX28988ST that is about three years old the frig is good but the freezer will not get cold enough. The condenser coils in the back are clean and the fan is running. The fan in the freezer seems to run. Door seals look good. Lights shut off with the door. Any ideas?

You have a sealed system problem. This is beyond the scope of most do-it-yourselfers and expensive to have it done. LG covers the parts for seven years. It might be worth it to call and see they'll give you a concession for the labor too.